Inspiried by Yunalica's The Nightmare in the Leaf
Nightmare Moon floated in the void that the elements of harmony had sent her to after removing her from luna, she didn't didn't know how long it had been ether as she would catch a glimps of other worlds including at least 3 different versions of Equestria .
As she allowed herself to float away another viewing portal of yet another world she heard a faint cry of "ease, I don't want to die,someone help me" followed by what sounding like a foals crying growing fainter, making up her mind the ethral body of nightmare moon became a mist like form and flew into the viewing window and towards the foal that had cried out to be saved.
Yumeko Uzumaki lay on the ground within training ground 44 slowly bleeding out through multiple stab and slash wounds, now normally the kyuubi would be healing her with it's chakra but sadly this time the ninja that had joined in on the 'fox hunt' had been smart enough to apply prisoner sealed to her to stop her from using any chakra including the kyubi's.
As she laid there on the ground Yumeko cried for her life being cut short and on her 6th birthday, out of desperate hope that one of the AnBu that liked her would be near she called out "Someone please, I don't want to die, someone help me" before breaking down and crying once again her cries for help and crying slowly over taxing her lung and causing her to shift her already hurt ribs, slowly her crying become softer as she neared deaths door, but it was at that moment that a cloud that looked to made of stars formed over her and lowered itself towards her claiming to be able to help her if only she would open herself up to it merging with her, and it was out of the primal need to live that Yumeko accepted the offer and it was at that moment things changed and the venetual rise of kohona's Nightmare Princess began but it wouldn't be for many years to come that konoha would know that their so called 'demon brat' or any other unsightly names the civilians have labeled her with that they would know the times changing and the leaders of the elemental nations would feel the reprocussions of nightmare moon and yumeko's plans.
I hope everyone has enjoyed this 1st chapter it's more or less to feel out if i should keep going or not and i've not watched MLP:FIM in ages but i hoped i got nightmare moon as close to cannon as possible even with her showing a soft side towards children/foals {baby/child ponies and horses}